2155032320 has 72 divisors (see below), whose sum is σ = 5899425504. Its totient is φ = 738865152.

The previous prime is 2155032317. The next prime is 2155032359. The reversal of 2155032320 is 232305512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111299 + ... + 129218.

Almost surely, 2^2155032320 is an apocalyptic number.

2155032320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2155032320 is an abundant number, since it is smaller than the sum of its proper divisors (3744393184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2155032320 is an equidigital number, since it uses as much as digits as its factorization.

2155032320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240545 (or 240531 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 2155032320 is about 46422.3256634133. The cubic root of 2155032320 is about 1291.6690772252.

Adding to 2155032320 its reverse (232305512), we get a palindrome (2387337832).

The spelling of 2155032320 in words is "two billion, one hundred fifty-five million, thirty-two thousand, three hundred twenty".